213453302520 has 64 divisors (see below), whose sum is σ = 640478171520. Its totient is φ = 56910368384.

The previous prime is 213453302509. The next prime is 213453302597. The reversal of 213453302520 is 25203354312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 499339 + ... + 822341.

It is an arithmetic number, because the mean of its divisors is an integer number (10007471430).

Almost surely, 2^213453302520 is an apocalyptic number.

213453302520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213453302520 is an abundant number, since it is smaller than the sum of its proper divisors (427024869000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213453302520 is a wasteful number, since it uses less digits than its factorization.

213453302520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328524 (or 328520 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 213453302520 its reverse (25203354312), we get a palindrome (238656656832).

The spelling of 213453302520 in words is "two hundred thirteen billion, four hundred fifty-three million, three hundred two thousand, five hundred twenty".